Add `UserTokenRequiredMixin`.

Create a subclass of `UserPassesTestMixin` that checks user
has an authorized token.

musician/mixins.py

@@ -1,6 +1,8 @@
+from django.contrib.auth.mixins import UserPassesTestMixin
 from django.views.generic.base import ContextMixin
 
 from . import get_version
+from .auth import SESSION_KEY_TOKEN
 
 
 class CustomContextMixin(ContextMixin):
@@ -12,3 +14,20 @@ class CustomContextMixin(ContextMixin):
         })
 
         return context
+
+
+class UserTokenRequiredMixin(UserPassesTestMixin):
+    def test_func(self):
+        """Check that the user has an authorized token."""
+        token = self.request.session.get(SESSION_KEY_TOKEN, None)
+        if token is None:
+            return False
+
+        # initialize orchestra api orm
+        self.orchestra = api.Orchestra(auth_token=token)
+
+        # verify if the token is valid
+        if self.orchestra.verify_credentials() is None:
+            return False
+
+        return True

musician/views.py

@@ -1,4 +1,4 @@
-from django.contrib.auth.mixins import LoginRequiredMixin
+
 from django.http import HttpResponseRedirect
 from django.shortcuts import render
 from django.urls import reverse_lazy
@@ -6,12 +6,13 @@ from django.views.generic.base import RedirectView, TemplateView
 from django.views.generic.edit import FormView
 
 from . import api, get_version
-from .auth import login as auth_login, logout as auth_logout
+from .auth import login as auth_login
+from .auth import logout as auth_logout
 from .forms import LoginForm
-from .mixins import CustomContextMixin
+from .mixins import CustomContextMixin, UserTokenRequiredMixin
 
 
-class DashboardView(CustomContextMixin, TemplateView):  ## TODO LoginRequiredMixin
+class DashboardView(CustomContextMixin, UserTokenRequiredMixin, TemplateView):
     template_name = "musician/dashboard.html"